CAS 6428-31-5

Direct Black 19

Description:

Direct Black 19, with the CAS number 6428-31-5, is a synthetic azo dye commonly used in the textile industry for dyeing cotton and other cellulose fibers. This dye is characterized by its deep black color and excellent lightfastness, making it suitable for applications where color stability is essential. It is water-soluble, allowing for easy application in dyeing processes. The chemical structure of Direct Black 19 includes multiple azo groups, which contribute to its color properties and affinity for fibers. However, like many azo dyes, it may raise environmental and health concerns due to potential degradation products that can be toxic or carcinogenic. Therefore, its use is often regulated in various countries. In addition to textiles, Direct Black 19 may also find applications in other industries, such as paper and leather, where deep coloration is desired. Proper handling and disposal practices are essential to mitigate any environmental impact associated with its use.

Formula: C₃₄H₂₉N₁₃O₇S₂·2Na

InChI: InChI=1S/C34H29N13O7S2.2Na/c35-18-1-11-26(24(37)15-18)44-40-20-3-7-22(8-4-20)42-46-32-28(55(49,50)51)13-17-14-29(56(52,53)54)33(34(48)30(17)31(32)39)47-43-23-9-5-21(6-10-23)41-45-27-12-2-19(36)16-25(27)38;;/h1-16,48H,35-39H2,(H,49,50,51)(H,52,53,54);;

InChI key: InChIKey=JUXVLJKHWACNJB-UHFFFAOYSA-N

SMILES: NC=1C2=C(C=C(S(=O)(=O)O)C(N=NC3=CC=C(N=NC4=C(N)C=C(N)C=C4)C=C3)=C2O)C=C(S(=O)(=O)O)C1N=NC5=CC=C(N=NC6=C(N)C=C(N)C=C6)C=C5.[Na]

Synonyms:

• (3E)-5-amino-6-[(E)-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}diazenyl]-3-(2-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}hydrazinylidene)-4-oxo-3,4-dihydronaphthalene-2,7-disulfonic acid
• 2,7-Naphthalenedisulfonic acid, 4-amino-3,6-bis[2-[4-[2-(2,4-diaminophenyl)diazenyl]phenyl]diazenyl]-5-hydroxy-, sodium salt (1:2)
• 2,7-Naphthalenedisulfonic acid, 4-amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxy-, disodium salt
• Artificial Silk Black G
• Artificial Silk Black GN
• Artificial Silk Black GR
• Atlantic Artificial Silk Black G
• Bali Viscose Black G
• Bali Viscose Black N
• Bencidal Fast Black G
• Benzanil Fast Black G
• Benzo Fast Black G
• Benzoform Black RRA-CF
• Bonjet Black 891L
• Chlorazol Viscose Black B
• Chrome Leather Black GNA
• Cibafix Direct Black 19
• Columbia Fast Black G
• Columbia Fast Black GB
• Coranil Direct Black B
• Cutamin Black CG
• Daiwa Black 320H
• Diamine Fast Black B
• Diaphtamine Fast Black KG
• Direct Artificial Silk Black G
• Direct Black G
• Direct Black L 3BG
• Direct Fast Black G
• Direct Fast Black GU
• Direct Fast Black SA
• Direct Lightfast Black G
• Direct Rayon Black KSG
• Fenamin Black GR
• Formal Fast Black 2B
• Hispamin Fast Black CG
• Indoblack GR
• Kayafect Black LW
• Kayarus Black G
• Kayarus Black G Conc.
• Orient P 200
• Orient Water Black 100L
• Orient Water Black 108L
• Orient Water Black 200L
• Orient Water Black 7
• Orient Water Black L 200
• Phenamine Viscose Black RR
• Pyrazol Fast Black GS
• Rayon Black G
• Rayon Black GSN
• Rayon Black M
• Rayon Fast Black B
• Solar Black G
• Sumilight Black G
• Tertrodirect Black V
• Tetrazo Deep Black GC Extra
• Visco Black N
• Viscose Black G
• Viscose Black GNA
• Viscose Black J
• Viscose Black N
• Viscose Black NG
• Vondacel Black VG
• Vondacel Black VN
• Water Black 100
• Water Black 100L
• Water Black 108L
• Water Black 200L
• Water Black 7
• Water Black L 200
• Water Black P 200
• disodium (3E)-5-amino-6-[(E)-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}diazenyl]-3-(2-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}hydrazinylidene)-4-oxo-3,4-dihydronaphthalene-2,7-disulfonate
• C.I. Direct Black 19, disodium salt

Direct Black 19

CAS: 6428-31-5

Formula: C₃₄H₂₉N₁₃Na₂O₇S₂

Purity: 98%

Molecular weight: 841.7865

Ref: IN-DA01DNSA

Direct Black 19

CAS: 6428-31-5

Direct Black 19

Formula: C₃₄H₂₇N₁₃Na₂O₇S₂

Purity: BS

Molecular weight: 657.68

Ref: 54-OR1028017

Direct Black 19

CAS: 6428-31-5

Direct Black 19 is a polymer that is a reactive dye. It is a cationic surfactant and can be used in wastewater treatment to remove color from the water. Direct Black 19 has been shown to inhibit the growth of Gram-positive bacteria such as Staphylococcus aureus, Enterococcus faecalis, and Bacillus subtilis. The use of this polymer also decreases the amount of nitrogen atoms in the water and reduces the chloride content. This product is insoluble in water and does not produce any gas when heated.
Direct Black 19 has shown no toxic effects on humans or animals.

Formula: C₃₄H₂₇N₁₃O₇S₂•Na₂

Purity: Min. 95%

Molecular weight: 839.77 g/mol

Ref: 3D-FD44459